1 #include <iostream>
2 #include <cstdio>
3 #include <algorithm>
4
5 using namespace std;
6 const int maxn = 10005;
7 double a[maxn];
8 int b[maxn];
9 double c[maxn];
10
11 int main(){
12 ios::sync_with_stdio(false);
13 int k;
14 cin >> k;
15 int x;
16 double y;
17 int Max = 0;
18 for (int i = 1; i <= k; i++){
19 cin >> x >> y;
20 a[x] += y;
21 if (Max < x)
22 Max = x;
23 }
24 int k1;
25 cin >> k1;
26 for (int i = 1; i <= k1; i++){
27 cin >> x >> y;
28 a[x] += y;
29 if (Max < x)
30 Max = x;
31 }
32 int ans = 0;
33 for (int i = Max; i >= 0; i--){
34 if (a[i] == 0) continue;
35 b[ans] = i;
36 c[ans++] = a[i];
37 }
38 cout << ans;
39 for (int i = 0; i < ans; i++){
40 printf(" %d %.1lf", b[i], c[i]);
41 //cout << " " << b[i] << " " << c[i];
42 }
43 //最后一行没有空格（包括换行）
44 //cout << endl;
45 system("pause");
46 return 0;
47 }
